CN111072894A - Polyurethane grouting material and preparation method thereof - Google Patents
Polyurethane grouting material and preparation method thereof Download PDFInfo
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- CN111072894A CN111072894A CN201911286427.1A CN201911286427A CN111072894A CN 111072894 A CN111072894 A CN 111072894A CN 201911286427 A CN201911286427 A CN 201911286427A CN 111072894 A CN111072894 A CN 111072894A
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- isocyanate
- grouting material
- polyether polyol
- polyurethane grouting
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/794—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aromatic isocyanates or isothiocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
Abstract
The invention discloses a polyurethane grouting material, which relates to the field of grouting materials and comprises a modifier, isocyanate, polyether polyol, a modified adhesive, acrylate, a plasticizer, a catalyst, a retarder and a dispersing agent, wherein the modifier is fiber slurry or nylon 6, the quantity ratio of-NCO groups of the isocyanate to-OH substances in the polyether polyol is 10:1, and the modified adhesive is isocyanurate modified toluene diisocyanate. The invention also discloses a preparation method of the prepolymer, and the prepolymer is prepared by adding a modifier and the like. The invention has the advantages that: due to the fact that the fiber slurry or the nylon 6 is added into the polyurethane grouting material, the flowability of the polyurethane grouting material is enhanced in the using process, the modified toluene diisocyanate is used for forming the cohesive elastomer, internal heat can be effectively reduced after grouting, and contraction caused by cohesion is avoided.
Description
Technical Field
The invention relates to the field of grouting materials, in particular to a polyurethane grouting material and a preparation method thereof.
Background
The grouting material is injected into structures such as buildings or pavements through grouting and reacts with water to generate a water-insoluble slurry material with a certain elasticity or strength consolidation body. Grouting materials are commonly used in the aspects of roadbed repair, bridge repair, building repair and the like in the prior art, and polyurethane grouting materials are adopted for repair in the prior art. However, the existing polyurethane grouting material is easy to generate high internal heat during the expansion process and has poor fluidity during the grouting process. Therefore, the filling effect of the polyurethane grouting material in the grouting process of some special positions is poor, and particularly when the polyurethane grouting material is used for grouting a building with a deep gap, the self-condensation polymerization inside the building is easy to occur due to overhigh internal heat, so that the gap inside the building cannot be filled.
Disclosure of Invention
The invention aims to solve the technical problem of how to improve the fluidity of the polyurethane grouting material and reduce internal heat.
In order to solve the technical problems, the technical scheme of the invention is as follows: a polyurethane grouting material comprises a modifier, isocyanate, polyether polyol, a modified adhesive, acrylate, a plasticizer, a catalyst, a retarder and a dispersing agent, wherein the modifier is fiber slurry or nylon 6, the quantity ratio of-NCO groups of the isocyanate to-OH substances in the polyether polyol is 10:1, the weight ratio of prepolymers formed by the acrylate, the isocyanate and the polyether polyol is 1:5, the weight ratio of the modified adhesive to prepolymers formed by the isocyanate and the polyether polyol is 1:4, the weight ratio of the plasticizer to prepolymers formed by the isocyanate and the polyether polyol is 1:2, and the weight ratio of the catalyst to prepolymers formed by the isocyanate and the polyether polyol is 1: 200, wherein the weight ratio of the retarder to a prepolymer formed by isocyanate and polyether polyol is 1:100, the weight ratio of the dispersant to a prepolymer formed by isocyanate and polyether polyol is 1:100, and the modified adhesive is isocyanurate modified toluene diisocyanate.
Preferably, the isocyanate is diphenylmethane diisocyanate or polyphenyl polymethylene polyisocyanate.
Preferably, the polypropylene oxide polyol.
Preferably, the plasticizer is one or more of dibutyl ester, dioctyl ester and triphenyl phosphate.
Preferably, the catalyst is octyl tin, dibutyltin dilaurate or stannous butyrate.
Preferably, the retarder is hydrogen chloride gas, benzoyl chloride or adipoyl chloride.
Preferably, the dispersant is an organosilicon dispersant.
It is another object of the present invention to provide a method for preparing the polyurethane grouting material as described above, by obtaining the polyurethane grouting material through the following steps;
the method comprises the following steps: mixing isocyanate and polyether polyol, and fully stirring for reaction to obtain a prepolymer;
step two: preparing an additional material composite mixture, adding a modifier and a dispersant into a plasticizer, and fully stirring and dispersing;
step three: adding the modified adhesive into the acrylate, and fully stirring and dispersing;
step four: fully mixing the mixture in the second step and the mixture in the third step with a catalyst and a retarder;
step five: and fully stirring and mixing the prepolymer in the step one and the mixture in the step four to obtain the polyurethane grouting material.
By adopting the technical scheme, the fluidity of the polyurethane grouting material is enhanced in the using process by adding the fiber slurry or the nylon 6 into the polyurethane grouting material, and the cohesive elastomer is formed by using the modified toluene diisocyanate, so that the internal heat can be effectively reduced after grouting, and the contraction caused by cohesion is avoided.
Drawings
FIG. 1 is a flow chart of a production process in the present invention;
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment discloses a polyurethane grouting material, which consists of a modifier, isocyanate, polyether polyol, a modified adhesive, acrylate, a plasticizer, a catalyst, a retarder and a dispersant, the modifier is fiber slurry, the quantity ratio of the-NCO group of the isocyanate to the-OH substance in the polyether polyol is 10:1, in the specific embodiment, the isocyanate is hexamethylene diisocyanate, the weight ratio of the prepolymer formed by the acrylic ester, the isocyanate and the polyether glycol is 1:5, the weight ratio of the modified adhesive to the prepolymer formed by isocyanate and polyether polyol is 1:4, the weight ratio of the plasticizer to the prepolymer formed by the isocyanate and the polyether polyol is 1:2, and the weight ratio of the catalyst to the prepolymer formed by the isocyanate and the polyether polyol is 1: 200, wherein the weight ratio of the retarder to a prepolymer formed by isocyanate and polyether polyol is 1:100, the weight ratio of the dispersant to a prepolymer formed by isocyanate and polyether polyol is 1:100, and the modified adhesive is isocyanurate modified toluene diisocyanate.
In this specific example, the polyether polyol is polypropylene oxide polyol, specifically N-204 polyether polyol, and its molecular weight is 400. The plasticizer is triphenyl phosphate, the catalyst is octyl tin, the retarder is benzoyl chloride, and preferably, the dispersant is an organic silicon dispersant, specifically, the dispersant is a dispersant containing silicone oil.
The polyurethane grouting material is obtained through the following steps;
the method comprises the following steps: 30 g of N-204 polyether (dihydric alcohol with the number average molecular weight of 400) is put into a reaction kettle, the temperature is raised to 100 ℃, the stirring is carried out, the vacuum pumping, the dehydration and the degassing are carried out for 3 hours, the temperature is reduced to 40 ℃, 187.5 g of hexamethylene diisocyanate are added, the reaction is carried out for 2 hours at the temperature of 80 ℃, and the temperature is reduced to 40 ℃, thus 217.5 g of polyurethane prepolymer is obtained.
Step two: 20g of glass fiber and 2.175g (within an error of 0.5 g) of silicone were added to 108.75g (within an error of 1g) of dibutyl phthalate, and the mixture was stirred to be sufficiently mixed and dispersed. The fibers are added and fully dispersed through the organic silicon dispersing agent, so that the smoothness of the fibers can be effectively utilized in the plasticizer, the phenomenon that the fibers are solidified and cannot be used during grouting is prevented, and the flowability of the grouting material can be effectively improved.
Step three: heating 20g of toluene diisocyanate to 50 ℃, performing polycondensation to form isocyanurate, performing stirring reaction for 20min, cooling to normal temperature, and fully mixing with 34.375g (with an error of 1g) of toluene diisocyanate to obtain a modified adhesive.
The above modified binder was added to 43.5g of an acrylic ester, and sufficiently stirred and dispersed.
Step four: the mixture from step two and step three was stirred and mixed thoroughly with 1.08g (error 0.2g) of octyl tin and 2.175g (error 0.2g) of benzoyl chloride.
Step five: and fully stirring and mixing the prepolymer in the step one and the mixture in the step four to obtain the polyurethane grouting material, and filling the polyurethane grouting material into building structures such as gaps for joint filling and repairing after mixing.
Example 2
The embodiment discloses a polyurethane grouting material, which consists of a modifier, isocyanate, polyether polyol, a modified adhesive, acrylate, a plasticizer, a catalyst, a retarder and a dispersant, the modifier is fiber slurry, the quantity ratio of the-NCO group of the isocyanate to the-OH substance in the polyether polyol is 10:1, in the specific embodiment, the isocyanate is diphenylmethane diisocyanate, the weight ratio of the prepolymer formed by the acrylic ester, the isocyanate and the polyether glycol is 1:5, the weight ratio of the modified adhesive to the prepolymer formed by isocyanate and polyether polyol is 1:4, the weight ratio of the plasticizer to the prepolymer formed by the isocyanate and the polyether polyol is 1:2, and the weight ratio of the catalyst to the prepolymer formed by the isocyanate and the polyether polyol is 1: 200, wherein the weight ratio of the retarder to a prepolymer formed by isocyanate and polyether polyol is 1:100, the weight ratio of the dispersant to a prepolymer formed by isocyanate and polyether polyol is 1:100, and the modified adhesive is isocyanurate modified toluene diisocyanate.
In this specific example, the polyether polyol is polypropylene oxide polyol, specifically N-204 polyether polyol, and its molecular weight is 400. The plasticizer is dibutyl phthalate, the catalyst is octyl tin, the retarder is benzoyl chloride, and preferably, the dispersing agent is an organic silicon dispersing agent, and particularly, the dispersing agent is a silicone oil dispersing agent.
The polyurethane grouting material is obtained through the following steps;
the method comprises the following steps: 30 g of N-204 polyether (dihydric alcohol with the number average molecular weight of 400) is put into a reaction kettle, the temperature is raised to 100 ℃, the stirring is carried out, the vacuum pumping, the dehydration and the degassing are carried out for 3 hours, the temperature is reduced to 40 ℃, 126.15 g of diphenylmethane diisocyanate is added, the reaction is carried out for 2 hours at the temperature of 80 ℃, and the temperature is reduced to 40 ℃ to obtain 156.15 g of polyurethane prepolymer.
Step two: 14.35g of nylon 6 and 1.56g (within an error of 0.5 g) of silicone were added to 78g (within an error of 1g) of dibutyl phthalate, and the mixture was stirred to be sufficiently mixed and dispersed. The fibers are added and fully dispersed through the organic silicon dispersing agent, so that the smoothness of the fibers can be effectively utilized in the plasticizer, the phenomenon that the fibers are solidified and cannot be used during grouting is prevented, and the flowability of the grouting material can be effectively improved.
Step three: 19g of toluene diisocyanate is heated to 50 ℃ to be condensed to form isocyanurate, the temperature is reduced to normal temperature after the stirring reaction is carried out for 20min, the modified adhesive is obtained by fully mixing the modified adhesive with 20g (with the error of 1g) of toluene diisocyanate, the toluene diisocyanate forms isocyanurate in the heating process and is elastomer formed by cohesion, the elastomer can greatly reduce the heat of internalization in the process of filling and expanding the polyurethane grouting material, the expansion rate of the main component which is affected by the cohesion reaction in the grouting process is reduced, and the consolidation strength can be effectively improved.
The above modified binder was added to 31.2g of an acrylic ester, and sufficiently stirred and dispersed.
Step four: the mixture from step two and step three was stirred and mixed thoroughly with 0.8g (error 0.2g) of dibutyltin dilaurate and 1.7g (error 0.2g) of adipoyl chloride. In other embodiments of the present invention, stannous butyrate may be used as the catalyst, and hydrogen chloride gas may be used as the retarder.
Step five: and fully stirring and mixing the prepolymer in the step one and the mixture in the step four to obtain the polyurethane grouting material, and filling the polyurethane grouting material into building structures such as gaps for joint filling and repairing after mixing.
The polyurethane grouting material in the two embodiments is tested to obtain the polyurethane grouting material with the viscosity of 3mPas, the usable standing time of 5h, the consolidation strength of 60MPa and the dry joint grouting bonding strength of 2 MPa. It can be seen that the polyurethane grouting material of the present invention has low viscosity and good pourability, can prevent shrinkage due to volatilization, and contains no solvent with low flash point, can prevent solvent volatilization, and can increase flash point. Due to the fact that the fiber slurry or the nylon 6 is added into the polyurethane grouting material, the mobility of the polyurethane grouting material is enhanced in the using process, the modified toluene diisocyanate is used for forming the cohesive elastomer, internal heat can be effectively reduced after grouting, and contraction caused by the internal heat can be effectively prevented.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (8)
1. A polyurethane grouting material is characterized in that: the modified polyurethane adhesive is characterized by comprising a modifier, isocyanate, polyether polyol, a modified adhesive, acrylate, a plasticizer, a catalyst, a retarder and a dispersant, wherein the modifier is fiber pulp or nylon 6, the quantity ratio of-NCO groups of the isocyanate to-OH substances in the polyether polyol is 10:1, the weight ratio of prepolymers formed by the acrylate, the isocyanate and the polyether polyol is 1:5, the weight ratio of the modified adhesive to prepolymers formed by the isocyanate and the polyether polyol is 1:4, the weight ratio of the plasticizer to prepolymers formed by the isocyanate and the polyether polyol is 1:2, and the weight ratio of the catalyst to prepolymers formed by the isocyanate and the polyether polyol is 1: 200, wherein the weight ratio of the retarder to a prepolymer formed by isocyanate and polyether polyol is 1:100, the weight ratio of the dispersant to a prepolymer formed by isocyanate and polyether polyol is 1:100, and the modified adhesive is isocyanurate modified toluene diisocyanate.
2. The polyurethane grouting material according to claim 1, wherein: the isocyanate is diphenylmethane diisocyanate or polyphenyl polymethylene polyisocyanate.
3. The polyurethane grouting material according to claim 1, wherein: the polypropylene oxide polyol.
4. The polyurethane grouting material according to claim 1, wherein: the plasticizer is one or more of dibutyl ester, dioctyl ester and triphenyl phosphate.
5. The polyurethane grouting material according to claim 1, wherein: the catalyst is octyl tin, dibutyltin dilaurate or stannous butyrate.
6. The polyurethane grouting material according to claim 1, wherein: the retarder is hydrogen chloride gas, benzoyl chloride or adipoyl chloride.
7. The polyurethane grouting material according to claim 1, wherein: the dispersant is an organic silicon dispersant.
8. A preparation method of a polyurethane grouting material is characterized by comprising the following steps: obtaining a polyurethane grouting material through the following steps;
the method comprises the following steps: mixing isocyanate and polyether polyol, and fully stirring for reaction to obtain a prepolymer;
step two: preparing an additional material composite mixture, adding a modifier and a dispersant into a plasticizer, and fully stirring and dispersing;
step three: adding the modified adhesive into the acrylate, and fully stirring and dispersing;
step four: fully mixing the mixture in the second step and the mixture in the third step with a catalyst and a retarder;
step five: and fully stirring and mixing the prepolymer in the step one and the mixture in the step four to obtain the polyurethane grouting material.
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| CN201911286427.1A CN111072894A (en) | 2019-12-13 | 2019-12-13 | Polyurethane grouting material and preparation method thereof |
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Cited By (2)
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| CN112480656A (en) * | 2020-12-28 | 2021-03-12 | 无锡琛华复合材料有限公司 | Environment-friendly polyurethane glass fiber composite material and preparation method thereof |
| CN113817125A (en) * | 2021-10-23 | 2021-12-21 | 上海立投工贸有限公司 | Modified polyurethane grouting material and preparation method thereof |
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| CN112480656A (en) * | 2020-12-28 | 2021-03-12 | 无锡琛华复合材料有限公司 | Environment-friendly polyurethane glass fiber composite material and preparation method thereof |
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